The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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A Study on the PCB Design of a CAT.5E Modular Jacks Employing Field Cancellation Techniques

PCB에서 필드 상쇄 기법을 적용한 Cat. 5E급 모듈라잭 설계에 관한 연구

  • 류대우 (한양대학교 전자통신공학과) ;
  • 이중근 (한양대학교 전자통신공학과)
  • Published : 2001.01.01
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Abstract

In this paper, a method of canceling and suppressing differential mode crosstalk noise signals caused by non-uniform coupling between two transmission lines in UTP (unshielded twisted pair) modular jacks is discussed. Differential mode crosstalk noise signals in balanced transmission lines with UTP modular jacks were suppressed, by applying field cancellation techniques to this modular jack. To verify an effectiveness of the field cancellation techniques, 8 pin modular jacks were made, and the NEXT (Near End Crosstalk) losses were measured to prove its applicability by the network analyzer(HP8720C) at 100 Mb/s.

본 논문은 필드 상쇄 기술을 사용하여 PCB(printed circuit board) 기판으로 모듈라 잭 내부구조를 설계한 후 측정하여 이론과 실제가 일치함을 보였다. 모듈라 플러그의 경우, Maxwell 3D parameter extractor S/W를 사용하여 M.O.M(method of moment) 방식으로 예상되는 C(capacitance) 값을 추출한 후, 그 값에 맞는 PCB를 설계한 후 , 시뮬레이션하여 최적의 값을 얻었고, 이를 근거로 PCB를 제작하여 네트웍 분석기(network analyzer)로 측정항목들을 측정하였다. 측정 결과와 필드 상쇄 기술을 사용한 시뮬레이션 결과가 잘 일치함을 보였다.

Keywords

References

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